I am no longer able to enter into /usr/bin without my file browser going bust and my system/CPU/memory/swap/whatever the hell freezing the entire PC and getting stuck for literally 3 or 4 minutes before it finally opens the file/folder.

I dunno whether it has to do with what I notice to be a folder within /usr/bin that contains (according to file browser's count) 2000-plus items in it called /usr/bin/X11 (when I want to go there the same thing happens all over again and it takes me almost 5 minutes just to enter and see the damn folder!!!

What on earth is going on?